Electric switch.



0. M. KNOBLOGK'. ELECTRIC SWITCH. APPLICATION FILED JL{LY11,1912.

Patehted Dec. 9, 1913.

S'iflliiififhEENT ()FFICE.

orro at. Mormon, or ocean nnnp, INDIANA.

,nwcrarc swi'ron.

Specification 0t Letters-Bataan Patented Dec. 9, 19113.

To all whom it may concefn:

Be it lznowii that IyOr'ro M. KNonLocn,

a citizen of the United States, residing at South Bend, in the county of St. Joseph and State ofIndiana, have inventedcertainncw and useful Improvements in lolectric Switches, f hi h the following is a specifi- 1 adapted to coiiperate with each other to this end. I

A further object is to provide an effective switch, wherein the blade is 'iositively forced into close engagement with the terminal contacts.

.These and other objects hereinafter described, are attained by the means illustrated in the'accompanying drawing, in -.which:

Figure 1 is a perspective view of my improved switch, showing the single throw type. -Fig. 2 is a like view of the base of said switch. Fig. 3 is a plan View of the same switch. Fig.4 is a cross section on the line d--i of Fig. 3. Fig. is a similar view on tl1e'.line 5-5 of Fig. 3, and Fig. (3 a view of a two throw switch.

Similar reference numerals in all of the figures of the drawingdesignate like parts.

Referring to Figs. 1 to 5, inclusive, of the drawing, the non-conductor base 7 is recessed along one edge, as shown at 8, form ing a high portion 9 and a low portion 10, said' high' portion 9 having shallow transverse grooves 11 formed therein. These grooves 11 are adapted to receive the contact plates 12, and said plates are provided with threaded apertures, which are engaged by the screws l lfto retain them in said grooves, and said screws are inserted from the under side of the base and project above said con: tact plates and adapted to receive the nuts 15. Plates 12 are reversible, as shown clearly in Figs. 1 and 3, in one instance, the anertured end extends over the lower portion ofthe base and forms part, of the support for the pivoted end of the blade 16, and in the other instance, the apertnred end lies in ends to form recesses for the heads of the screws. The base is also provided with apertures 18- through which screws can be passed to secure the switch in position. Blade 16 is pivoted on its screw 14: between its plate 12 and the lower portion of the base, and a washer 1.8 is placed between it and the base. Constructed as thus described, a movement of the blade 16 in one direction will bring it beneath the free end of one of the plates 12 and to positi ely force said blade into engagement with said plate a boss 19 is formed on the lower portion 8 of the base and over which the. blade passes. The outer edge of the boss 19 is beveled or inclined to positively direct the blade beneath the contact plate, and the incline prefcral'ily ends beneath the plate, whereby the edge of theblade can enter slightly under the edge of the plate. as shown in dotted lines in Fig. 3, before it is forced in contact. with said plate.

In assembling the parts, the screws 14 are inserted in their apertures from the under-- side of the base, as before mentioned, and engage with the threaded aperturesof the contact plates 12, said plates being drawn into the grooves 11 by the rotation of the screws. l

The two throw switch shown in Fig. 6, is shown approximately triangular in form, having a lower portion 20,-with the contact plates and blade mounted precisely in the same manner as shown in the single throw switch above described.

It will be understood that the shape of the grooved upper portion and a lower portion,

the bottom of said grooves being above the surface of said lower portion, contact plates seated in said grooves and projecting over said lower portion,,means for securing said plates in said grooves. a blade pivoted on one of said securing means between one of said plates and said lower portion, and a g3; ooms 1% boss on the lower portion whose top surface lies in a plane lower than the bottom of said grooves and in alinem ent with one of the plates :forforcing said blade into engage- 5 ment therewith. v

2'. A switch, comprising a base having a, grooved upper portion and :1 Iowa? portion the bottom of said grooves being above the 'surface of said Lower portion, contact plates 10 seated in said grooves anoi projecting OZET said lower portion, means for SQCHI'iTlQ said plates in said grooves a blade pivofed on one of securing moans between one of sfaid plates and said lower portion, and a boss on said iowev portion woose bop smitfa'ao 15 lies in a piano lower ahliUl {he bijriliflfi. of 1116i grooves and in aiinemorit w one of sairi phi-e5 for iioi-cingk; said biacio into 91} gag'ement therewith, mid boss iimin cg inclined front ecige Whiph ends bdTflQil-fll said 0 plate. in testimony whereof in presence of two witnes es. 

